* {
    margin: 0px;
    padding: 0px;
    text-decoration: none;
}

body {
    background-size: 100% 100%;
    background-image: url(../img/bg1.jpg);
    background-attachment: fixed;
}

#Head {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 2;
    list-style-type: none;
    overflow: hidden;
}

#u_img {
    margin-left: 25px;
    margin-top: 10px;
}

#u_img img {
    width: 70px;
    height: 70px;
    border-radius: 100%;
    overflow: hidden;
    float: left;
}

#u_img label {
    font-size: 25px;
    margin-top: 36px;
    margin-left: 5px;
    float: left;
    color: rgb(250, 190, 247);
}

#Head button {
    margin-right: 5px;
    border: none;
    float: right;
}

#Head .btn-secondary {
    margin-right: 510px;
    size: 60px;
}

#Head .btn {
    display: inline-block;
    outline: none;
    *zoom: 1;
    text-align: center;
    text-decoration: none;
    font-family: inherit;
    font-weight: 300;
    letter-spacing: 1px;
    vertical-align: middle;
    border: 1px solid;
    transition: all 0.2s ease;
    box-sizing: border-box;
    text-shadow: 0 1px 0 rgba(15, 15, 15, 0.01);
    border-radius: 3px;
    font-size: 0.873em;
    font-family: Arial, Helvetica, sans-serif;
    padding: 0.5375em 1.375em;
    color: #000000;
    border-color: #000000;
}

.btn:hover {
    background: #2b2929fa;
    border-color: #2b2929fa;
}


/*! 示例  */

#content {
    margin: auto;
    margin-top: 200px;
    color: white;
    width: 56rem;
}

.card-body {
    background-color: rgb(0, 0, 0, 0.5);
}

.card-body button {
    margin-top: 42px;
    margin-left: 5px;
}

#comment {
    background-color: rgb(34, 33, 33, 0.5);
}

#comment p {
    margin-left: 10px;
}

#comment button {
    margin-right: 6px;
    float: right;
}

#content p {
    margin-top: 10px;
}

.card {
    margin-top: 5px;
    border-color: #111;
}